Some desktop keyboards have an "F-Lock" button that toggles the function keys on and off.
8/10 for historical importance, 6/10 for modern necessity.
Hold Ctrl + F5 (or Ctrl + Shift + R ) for a “Hard Refresh.” This clears the page’s cache and downloads everything from scratch. Use this when a website looks broken or shows old data.
In PowerPoint, F5 serves a slightly different but related purpose: it starts your slideshow from the very first slide. (Shift + F5 starts the show from your current slide). The "Hard Refresh": Taking it a Step Further
Apple keyboards do not use F5 as a refresh key. If you are using a Mac, the "refresh function" is mapped to a different shortcut: : The standard refresh for Safari and Chrome. Command + Option + R : A hard refresh. Troubleshooting: Why isn't my F5 key working?
